html,body{
    margin: 0;
    padding: 0;
    li{
        font-size: 12px;
        line-height: 30px;
    }
    .box{
        width: 200px;
        height: 240px;

        background: url(../images/阿豆.jpg);
        background-size: cover;
    }
    .box2{
        width: 200px;
        height: 240px;

        background: url(../images2/阿豆.jpg);
        background-size: cover;
    }
}